The Question Most Traders Never Ask
Before you analyse a chart, before you check momentum scores, before you do anything else — there's one question worth asking: is the sector behind this stock actually in favour right now?
Most traders skip this step entirely. They go straight to individual stocks, looking for setups that match their criteria, without first checking whether the broader category is working. The result is technically sound trades that simply don't follow through, because the sector tailwind is absent or actively working against them.
Sector relative strength (RS) ranking changes this. It's the practice of measuring how each sector is performing against the broader market benchmark — and using that ranking to decide where to hunt for opportunities and where to stay away. AltraOne surfaces this metric directly on its platform as the Altra Sector Score.
This post explains how it works, why it matters, and how to read sector RS rankings across any market, whether you're trading US stocks, Indian equities, or Canadian names.
What Sector Relative Strength Actually Measures
Sector RS answers one question: is this sector outperforming or underperforming the broader market index over a defined period?
It's a comparative measurement. If the S&P 500 is up 8% over three months and the Technology sector is up 14%, Technology has positive RS — it's leading. If Energy is up only 3% in the same period, it has negative RS — it's lagging the index even in a rising market.
The same logic applies across markets:
- S&P 500 (US): Sectors are measured against the S&P 500 index. The 11 GICS sectors (Technology, Financials, Energy, Healthcare, etc.) are ranked relative to the broader index.
- NSE (India): Nifty sectoral indices — Banking, IT, Pharma, Auto, Energy, FMCG, and others — are measured against the Nifty 50 benchmark.
- TSX (Canada): Sectors including Financials, Energy, Materials, and Technology are measured against the S&P/TSX Composite Index.
The benchmark changes by market, but the concept is identical: how is this group of stocks moving relative to the whole?
One important distinction: RS is not RSI. RSI (Relative Strength Index) is an internal oscillator that measures a stock's recent gains against its recent losses on a 0–100 scale. RS is an external comparison — sector vs. benchmark. They measure completely different things and should never be used interchangeably.
Why Sector RS Matters: Where Stock Winners Come From
Research from Investor's Business Daily found that roughly 37% of a stock's price movement is directly tied to the performance of its broader industry group. That's a significant structural tailwind — or headwind — that follows every stock in a sector regardless of its individual technicals.
The implication is straightforward: the best individual stock setups tend to cluster in the best-performing sectors. A strong stock in a weak sector faces constant resistance. A good stock in a leading sector gets carried by the flow of institutional capital into that group.
This is why sector RS ranking is the second step in a disciplined top-down framework, not an afterthought.
How Different Markets Express Sector Leadership
The sectors that lead vary by market — and understanding each market's structural composition makes RS rankings easier to interpret.
S&P 500 — Technology and the Rotation Cycle
The S&P 500 is heavily weighted toward Technology and Communication Services, which together represent a significant share of the index. This means when Tech leads, the index tends to follow strongly — and when Tech lags, it creates drag even if other sectors are doing well.
Sector rotation in the US tends to follow the economic cycle. Early cycle recoveries often see Financials, Consumer Discretionary, and Industrials leading. Mid-cycle expansions tend to favour Technology and Communication Services. Late cycle environments often shift leadership toward Energy, Materials, and defensive sectors like Consumer Staples and Healthcare. In 2026, leadership has shifted notably away from the technology dominance of recent years, with Consumer Staples and Energy showing positive RS while Tech has been under pressure — a classic rotation pattern worth tracking.
NSE — Macro-Sensitive Sector Rotation
The NSE universe is shaped by India-specific macro factors. RBI rate decisions directly impact Banking and Realty sectors. Rupee movements influence IT and Pharma exporters — a weaker rupee improves their RS. Monsoon quality affects FMCG and Agriculture-linked stocks. Crude oil prices flow through to Energy, Auto, and related names.
This means NSE sector RS rankings can shift meaningfully around RBI policy events or global commodity moves. In 2025, NSE showed clear sectoral divergence, with cyclical sectors like PSU Banking and Metals leading, while defensive and consumption-oriented sectors produced more modest RS. Identifying which macro driver is dominant at a given moment helps interpret why certain sectors are leading. For a detailed breakdown of each major NSE sector and the drivers behind their rotation, see NSE Sector Relative Strength Ranking: How to Find Leading Sectors Before They Move.
TSX — Resource-Driven, Structurally Concentrated
The TSX has a fundamentally different profile from the S&P 500. Financials, Energy, and Materials together represent approximately 60–65% of the entire index. This concentration means TSX sector RS is heavily influenced by commodity prices — oil, gold, copper — and Canadian bank earnings cycles.
The TSX tends to lead global markets during commodity bull markets and trail during technology-driven bull markets. Canada's strong performance in 2025 — outpacing the S&P 500 significantly — was driven precisely by this structure: gold prices rallied, oil prices supported Energy, and Bank of Canada rate cuts fuelled financial sector strength. For momentum traders on the TSX, tracking RS in Financials, Energy, and Materials is particularly important because these sectors collectively set the tone for the whole market. Technology, mining, insurance, and retail also emerge as momentum leaders in certain cycles.
The 3-Step Top-Down Framework
Sector RS ranking sits at the centre of a three-stage filtering process. Each stage narrows the universe before any individual stock is evaluated.
Stage 1 — Market Texture
Before looking at any sector, assess the overall market environment. Are most stocks in the index trading above their key moving averages? Is breadth healthy? A market with broad participation across stocks and sectors is a different environment from one where only a handful of names are driving index returns.
If market texture is weak or deteriorating, the framework calls for caution regardless of individual sector or stock signals. Fighting a weak market consistently costs performance.
Stage 2 — Sector RS Ranking
With market health confirmed, the next question is: which sectors are leading right now? Positive RS sectors — those outperforming the benchmark — are where long opportunities are sourced. Sectors with negative RS are avoided for long positions, even if individual stocks within them look technically appealing.
This is the discipline that sector RS enforces. A stock in a lagging sector may set up beautifully on a chart, but without sectoral tailwind, it faces institutional selling pressure from funds rotating out of that sector. The sector RS ranking removes these candidates from consideration before analysis time is spent on them.
Stage 3 — Stock Selection Within Leading Sectors
Only now does individual stock analysis begin. Within the leading RS sectors, stocks are ranked by their own momentum scores. The highest-probability setups are stocks that are leading within an already-leading sector — momentum confirmed at every level of the hierarchy.
For a practical walkthrough of this framework applied to real stocks across NSE, S&P 500, and TSX, see How to Use AltraOne: A 3-Step Momentum System Walkthrough.
Reading a Sector RS Regime
Not all positive RS is equal. The regime classification — bullish, neutral, or bearish — provides a more actionable signal than raw RS numbers:
Bullish regime: The sector is actively outperforming the benchmark and momentum is building. Stock signals within the sector carry higher conviction. These are the environments where position sizing can be more aggressive.
Neutral regime: The sector is moving roughly in line with the broader market. Neither tailwind nor headwind exists. Stock signals here are taken more selectively, with smaller sizing, because the sector offers no amplification of individual momentum.
Bearish regime: The sector is underperforming the benchmark. Long positions here are avoided regardless of individual stock signals. The sector is experiencing capital outflows from institutional players, and fighting that rotation is a low-probability approach.
A divergence case — where an individual stock shows strong momentum inside a bearish sector — is noted but treated with caution rather than used as a buy signal. Genuine leadership eventually pulls a sector's RS up with it, but timing this correctly is difficult.
Sector RS Across Market Cycles
One of the most practically useful aspects of sector RS ranking is that it captures rotation patterns that repeat across cycles. Capital doesn't move randomly — it follows macro conditions, earnings cycles, and risk appetite in recognisable patterns.
Identifying that rotation early is the key to outperforming the index. Sectors consistently outperforming across multiple timeframes — measured over 3, 6, and 12 months — are stronger momentum candidates than those showing short-term spikes. Multi-period RS strength suggests institutional positioning, not just short-term speculative flows.
How AltraOne Tracks Sector RS Across All Three Markets
AltraOne's sector ranking pages provide end-of-day Altra Sector Score rankings for all three markets — NSE, S&P 500, and TSX — showing which sectors are currently in bullish, neutral, or bearish regimes relative to their respective benchmarks.
- NSE Sector Ranking: altraone.com/sector-ranking/nse
- US Sector Ranking: altraone.com/sector-ranking/us
- TSX Sector Ranking: altraone.com/sector-ranking/tsx
The workflow is the same for all three markets: check market texture first, identify leading sectors from the ranking, then move to individual stock momentum scores within those sectors. No signup is required and data refreshes daily.
FAQ
What is sector relative strength ranking?
Sector relative strength ranking — branded on AltraOne as the Altra Sector Score — measures each sector's performance against the market benchmark — such as the S&P 500, Nifty 50, or TSX Composite — over a defined period. Sectors are ranked from strongest (most outperforming) to weakest (most underperforming). The ranking tells you where institutional money is flowing and where it is leaving.
How is sector RS different from RSI?
They measure completely different things. RSI (Relative Strength Index) is an internal oscillator that compares a stock's recent gains to its recent losses on a 0–100 scale. Sector RS is an external comparison of one sector's performance against a benchmark index. A sector can have high RSI readings and negative RS (strong internal momentum but still lagging the market), or vice versa.
How often do sector rankings change?
Major sector rotations typically unfold over weeks to months, not days. Sustained rotations — the kind that produce extended trends in individual stocks — usually take several weeks to establish. Minor shifts can happen quickly around macro events like central bank decisions, earnings seasons, or commodity price swings. Checking sector RS rankings weekly is sufficient for swing and positional traders.
Do the same sectors always lead bull markets?
No. Sector leadership changes with each cycle. Technology led the S&P 500 bull market of the 2010s and into the early 2020s. Canada's TSX was driven by Energy and Materials in 2025. India's PSU Banking and Metals sectors led in 2025 while IT lagged. Historical sector patterns offer useful context but should not substitute for reading current RS rankings — what led last cycle often underperforms next cycle.
Can sector RS be used for intraday trading?
Sector RS rankings based on daily and weekly data are most relevant for swing and positional timeframes — trades held for days to weeks. For intraday purposes, the directional context provided by sector RS (which sectors are in bullish vs. bearish regimes) is useful background, but intraday entries require real-time tools beyond what an end-of-day screener provides.
What sectors tend to lead in rising markets?
In the early stages of a bull market, cyclical sectors — Financials, Industrials, Consumer Discretionary — often lead as economic growth expectations improve. Technology and Communication Services tend to lead in mid-cycle expansions. Defensive sectors like Healthcare, Consumer Staples, and Utilities tend to show relative strength during periods of market stress or slowdown. On the TSX, commodities-linked sectors (Energy, Materials) lead when global commodity cycles are in an upswing.
Start with the sectors — then find the stocks. Explore live sector RS rankings across NSE, S&P 500, and TSX at altraone.com.